Blar i HVL Open på forfatter "Balakin, Boris"
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CFD-DEM model of plugging in flow with cohesive particles
Saparbayeva, Nazerke; Balakin, Boris (Peer reviewed; Journal article, 2023)Plugging in flows with cohesive particles is crucial in many industrial and real-life applications such as hemodynamics, water distribution, and petroleum flow assurance. Although probabilistic models for plugging risk ... -
Cohesive collisions of particles in liquid media studied by CFD-DEM, video tracking, and Positron Emission Particle Tracking
Saparbayeva, Nazerke; Chang, Yu-Fen; Kosinski, Pawel Jan; hoffmann, alex christian; Balakin, Boris; Struchalin, Pavel (Peer reviewed; Journal article, 2023)This paper investigates the cohesive collision of ice in an oil phase at temperatures ranging from −15.7 °C to −0.3 °C. The new information on the coefficient of restitution (COR) was obtained using three different velocity ... -
Direct absorption solar collector: Use of nanofluids and biodegradable colloids
Nguyen, Linna V.; Kosinski, Pawel Jan; Balakin, Boris; Kosinska, Anna Dorota (Peer reviewed; Journal article, 2023)In this paper, an experimental and numerical analysis was performed on both carbon black nanofluids and a biodegradable fluid in a novel pump-free direct absorption solar collector (DASC). In the experiments, the nanofluid ... -
Eco-friendly and low-cost nanofluid for direct absorption solar collectors
Balakin, Boris; Struchalin, Pavel (Peer reviewed; Journal article, 2023)Nanofluids are promising receivers for solar collectors with volumetric absorption. These solar collectors are 1.2…1.4 times more efficient than conventional technology. However, most of the considered nanofluids are ... -
Eulerian CFD model of direct absorption solar collector with nanofluid
Bårdsgård, Runa By; Kuzmenkov, Dmitriy M.; Kosinski, Pawel Jan; Balakin, Boris (Peer reviewed; Journal article, 2020)Solar energy is the most promising source of renewable energy. However, the solar energy harvesting process has relatively low efficiency, while the practical use of solar energy is challenging. Direct absorption solar ... -
Experimental and numerical investigation of direct absorption solar collectors (DASCs) based on carbon black nanofluids
Wei, Shihao; Espedal, Lisbeth; Balakin, Boris; Kosinski, Pawel Jan (Peer reviewed; Journal article, 2023)Direct absorption solar collectors (DASCs) typically achieve high efficiency due to the volumetric heat absorption process facilitated by the working fluids. In this study, carbon black (CB) nanofluids were utilized as the ... -
Experimental investigation of erosion due to nanofluids
Braut, Marthe; González-Fernández, Luis; Kosinska, Anna Dorota; Grosu, Yaroslav; Kosinski, Pawel Jan; Balakin, Boris (Peer reviewed; Journal article, 2022)The demand for efficient and sustainable energy is continuously increasing. Among the many technologies with great potential within this field are nanofluids. Nevertheless, there is still a considerable lack of information ... -
Experimental study of hydrogen production using electrolyte nanofluids with a simulated light source
Wei, Shihao; Hikmati, Javad; Balakin, Boris; Kosinski, Pawel Jan (Peer reviewed; Journal article, 2022)In this research, we conducted water electrolysis experiments of a carbon black (CB) based sodium sulfate electrolyte using a Hoffman voltameter. The main objective was to investigate hydrogen production in such systems, ... -
Exploring the use of nanofluids in pump-free systems for solar thermal applications
Kosinska, Anna Dorota; Balakin, Boris; Kosinski, Pawel Jan (Peer reviewed; Journal article, 2023)By using nanofluids as a working fluid in pump-free designs, thermal energy systems can become more efficient and have reduced maintenance costs, ultimately extending the system’s lifespan. In this paper, our goal is to ... -
Extension of the hard-sphere model for particle-flow simulations
Kosinski, Pawel Jan; Balakin, Boris; Kosinska, Anna Dorota (Peer reviewed; Journal article, 2020)Discrete element methods require appropriate models for particle-particle collisions. Usually, researchers use soft-sphere types of models where the collision dynamics is solved numerically. This makes the simulation ... -
Field study of a direct absorption solar collector with eco-friendly nanofluid
Struchalin, Pavel G.; Zhao, Yansong; Balakin, Boris (Peer reviewed; Journal article, 2024)The concept of direct absorption solar collector (DASC) was introduced in the 1970s. Multiple laboratory studies proved that nanofluid-based DASCs presented a fruitful alternative to conventional solar collectors. However, ... -
Field study on the thermal performance of vacuum tube solar collectors in the climate conditions of Western Norway
Popsueva, Victoria; Olivares, Lopez Andres F; Kosinska, Anna Dorota; Nikolaev, Oleg; Balakin, Boris (Peer reviewed; Journal article, 2021)A significant part of energy consumption in Northern countries goes to heating. There is no consensus about the most efficient source of renewable heat there. This paper presents a field study for a 7.8 m2 vacuum tube solar ... -
Flow loop study of a cold and cohesive slurry. Pressure drop and formation of plugs
Struchalin, Pavel; Øye, Vegar Hovdenakk; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Balakin, Boris (Peer reviewed; Journal article, 2022) -
Hybrid Nanofluid in a Direct Absorption Solar Collector: Magnetite vs. Carbon Nanotubes Compete for Thermal Performance
Struchalin, Pavel; Kuzmenkov, Dmitrii M.; Yunin, Vladimir S.; Wang, Xinzhi; He, Yurong; Balakin, Boris (Peer reviewed; Journal article, 2022)The paper presents the experimental measurements of thermal efficiency of a tubular direct absorption solar collector (DASC) with a hybrid nanofluid based on magnetite (Fe3O4) and multi-walled carbon nanotubes (MWCNT). The ... -
Investigation of nanofluids in alkaline electrolytes: Stability, electrical properties, and hydrogen production
Wei, Shihao; Balakin, Boris; Kosinski, Pawel Jan (Peer reviewed; Journal article, 2023)Utilizing solar energy efficiently and manufacturing hydrogen economically are the primary goals in the energy industry. In this paper, we present a novel method to solve both issues by exploiting the electrolysis of ... -
Modeling Water Droplet Freezing and Collision with a Solid Surface
Shayunusov, Doston; Eskin, Dmitry; Balakin, Boris; Chugunov, Svyatoslav; Johansen, Stein Tore; Akhatov, Iskander (Journal article; Peer reviewed, 2021)Water droplets released from the sea surface represent one of the major causes of ice accretion on marine vessels. A one-dimensional model of the freezing of a spherical water droplet moving in cold air was developed. The ... -
Non-invasive studies of multiphase flow in process equipment. Positron emission particle tracking technique.
Balakin, Boris; Adamsen, Tom Christian Holm; Chang, Yu-Fen; Kosinski, Pawel Jan; Hoffmann, Alex Christian (Peer reviewed; Journal article, 2017) -
Novel Bio-compatible Tracers for Positron Emission Particle Tracking
Chang, Yu-Fen; Balakin, Boris (Peer reviewed; Journal article, 2020)To study the flow of objects in opaque flow processes, the PEPT (positron emission particle tracking) technique may be utilized. The PEPT technique is based on the same principle of positron emission tomography (PET). Both ... -
Numerical analysis of erosion due to nanoparticles in a pipe elbow
Kosinska, Anna Dorota; Balakin, Boris (Journal article; Peer reviewed, 2018)Flows of fluids laden with small particles in pipes are common in industry. An interesting and still unexplored issue is erosion of walls due to impact of particles. The main focus of our research was on nanoparticles. ... -
Numerical investigation of direct absorption solar collectors based on carbon black nanofluids
Wei, Shihao; Balakin, Boris; Kosinski, Pawel Jan (Peer reviewed; Journal article, 2023)A novel model of a rectangular direct absorption solar collector (DASC) based on carbon black (CB) nanofluids for concentrated solar power is presented herein. Distributions of temperature, velocity, volume fraction of ...